mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-16 14:02:10 +00:00
c7e0b5bf9f
Modules: ALSA sequencer Remove xxx_t typedefs from the core sequencer codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/*
|
|
* ALSA sequencer FIFO
|
|
* Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl>
|
|
*
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
#ifndef __SND_SEQ_FIFO_H
|
|
#define __SND_SEQ_FIFO_H
|
|
|
|
#include "seq_memory.h"
|
|
#include "seq_lock.h"
|
|
|
|
|
|
/* === FIFO === */
|
|
|
|
struct snd_seq_fifo {
|
|
struct snd_seq_pool *pool; /* FIFO pool */
|
|
struct snd_seq_event_cell *head; /* pointer to head of fifo */
|
|
struct snd_seq_event_cell *tail; /* pointer to tail of fifo */
|
|
int cells;
|
|
spinlock_t lock;
|
|
snd_use_lock_t use_lock;
|
|
wait_queue_head_t input_sleep;
|
|
atomic_t overflow;
|
|
|
|
};
|
|
|
|
/* create new fifo (constructor) */
|
|
struct snd_seq_fifo *snd_seq_fifo_new(int poolsize);
|
|
|
|
/* delete fifo (destructor) */
|
|
void snd_seq_fifo_delete(struct snd_seq_fifo **f);
|
|
|
|
|
|
/* enqueue event to fifo */
|
|
int snd_seq_fifo_event_in(struct snd_seq_fifo *f, struct snd_seq_event *event);
|
|
|
|
/* lock fifo from release */
|
|
#define snd_seq_fifo_lock(fifo) snd_use_lock_use(&(fifo)->use_lock)
|
|
#define snd_seq_fifo_unlock(fifo) snd_use_lock_free(&(fifo)->use_lock)
|
|
|
|
/* get a cell from fifo - fifo should be locked */
|
|
int snd_seq_fifo_cell_out(struct snd_seq_fifo *f, struct snd_seq_event_cell **cellp, int nonblock);
|
|
|
|
/* free dequeued cell - fifo should be locked */
|
|
void snd_seq_fifo_cell_putback(struct snd_seq_fifo *f, struct snd_seq_event_cell *cell);
|
|
|
|
/* clean up queue */
|
|
void snd_seq_fifo_clear(struct snd_seq_fifo *f);
|
|
|
|
/* polling */
|
|
int snd_seq_fifo_poll_wait(struct snd_seq_fifo *f, struct file *file, poll_table *wait);
|
|
|
|
/* resize pool in fifo */
|
|
int snd_seq_fifo_resize(struct snd_seq_fifo *f, int poolsize);
|
|
|
|
|
|
#endif
|